A suicide bomb attack in a nightclub has a shocking impact on the crew of the HMAS Hammersley. Dutchy goes undercover with the SAS to catch a group of deadly extremists who are planning attacks on Australian targets.

Kate is hunted down by an obsessed criminal after she kills his accomplice during a boarding. When Bird is kidnapped, the crew of the HMAS Hammersley fear that she will be murdered as a payback.

Dutchy rescues a beautiful young woman, then finds that he is the prime suspect in a cold-blooded murder. The crew of the HMAS Hammersley rush to save a professional diver who is trapped in a shark cage. Mike puts his naval career on the line to help Kate to get her promotion. Kate has to make the most difficult decision of her life after she falls foul of Maxine. Written by Allister Coots

Midshipman Ryan White is pleasantly surprised that he can join mate 2Dads aboard the Hammersley, yet fears hazing until commander Flynn assures him he's quite safe, especially as the captain's godson, except for innocent pranks. Patroling in the Arafura Sea, the ship finds only corpses floating around a burning, sinking ship. It soon becomes clear these Iraqi refugees were abandoned by the human trader, who poses as a grieving father. Swain breaks the secrecy instructions when confronted again with one of the real, legally immigrated relatives. Ryan refuses to consider a life-saving organ donation to his ever-absent father, Stuart White, who gets crucial support from Flynn. Written by KGF Vissers

The Hammersley must escort the 'monster', a prisoner, from Stokes Island to a mainland prison. The only doctor there, John Wallace, insists he's another victim of mining chemicals causing an excessive number of tumors on the island, especially in children. Fishery scientist Jason Merritt dismisses this as usual plot theory due to the doc's home-distilled rum. However the 'monster' dies while restrained and the exploded distillery is not the only target on Stokes Island. RO grudgingly helps Dutchy search for his secret service file after agent Cruise hinted at the war hero being a 'security risk', only to regret it. When Mike asks Maxine why his bone marrow matches Ryan's father unlike boy's, she lies first, then admits he's probably Ryan's biological father. Written by KGF Vissers

Dutchy makes up for a small mistake by putting his own life in danger, and on a personal level, Mike decides to let the past stay in the past - but will it?

A drug running operation in the Gulf leads to several violent gun battles, and Charge's big heart seems to let him down.

A drug running operation in the Gulf leads to several violent gun battles, and Charge's big heart seems to let him down.

When 2Dads agrees to help try to fix a privately owned submarine at sea, it leads to a catastrophic accident.

When 2Dads agrees to help try to fix a privately owned submarine at sea, it leads to a catastrophic accident.

Hammersley is in foreign waters assisting Madelaine Cruise on another clandestine ASIO mission. In a daring and dangerous evacuation on foreign soil, the RHIB party seek to rescue ASIO Agent Smith under gunfire.

A team building exercise for the junior Hammersley sailors turns into a deadly nightmare, meanwhile long kept secrets are reaching crisis point on board.

When Radio Officer (RO) Robert meets his new friend he doesn't know that their friendship was staged by a so called friend so now RO has to overcome his amnesia to remember what actually happened yesterday and to save his own life. He gets framed for his new friend's murder.

To the captain's dismay, his son Ryan has left the Navy for Garth Davidson's private security company GD. Its yacht MV Sassy is involved in suspicious transport under diplomat Tagobe's inviolability cover in pirates-infested waters. During a diamonds shipping, only Daidson is believed to survive a pirate attack. The Hammesrley crew however tracks down wounded Ryan, who confided only in the cook to be a secret service recruit, and works out Davidson's dirty game, for which RO researches a dire motive. Written by KGF Vissers

The crew of the Hammersley race to disarm a dirty bomb. Meanwhile, Kate ponders a proposal from Jim.

The crew of the Hammersley race to disarm a dirty bomb. Meanwhile, Kate ponders a proposal from Jim.